Excellent! Extremely efficient, very fast, and the quality and value of the product great! The materials seem of high quality and the workmanship seems precise and robust. The magnetic coupler offers much better protection against damage caused by stresses and accidents to the cable and device, and when the small magnetic lightning catch is left in the connection of the charging cable device is extremely fast and convenient and the lightning receptacle remains protected from ordinary debris entry at all times-a great improvement for a dedicated charging cable. And the design of the cable sheath seems to offer a lot more durability than the typical OEM cable jackets, yet is quite versatile. And it works nominally. It's a really great charging cable with striking improvements over ordinary designs! I am therefore completely satisfied, and will order more when a need arises.